/Engine/Source/Runtime/Engine/Public/TextureLayout3d.h
Removes a previously allocated element from the layout and collapses the tree as much as possible, In order to create the largest free block possible and return the tree to its state before the element was added.
True if the element specified by the input parameters existed in the layout.
bool RemoveElement ( uint32 ElementBaseX, uint32 ElementBaseY, uint32 ElementBaseZ, uint32 ElementSizeX, uint32 ElementSizeY, uint32 ElementSizeZ )